JPH06155104A - Cutting reproduction device for spot welding rod electrode surface - Google Patents

Abstract

PURPOSE:To perform cutting reproduction work quickly by forming projecting cutters, which form a rotational face matching with an electrode point part, taper face, radially and forming them discontinuously with a center part plate projecting cutter. CONSTITUTION:When the first and the second projecting cutters 4, 5 are brought in contact with an electrode point, the electrode is guided and supported by these four projecting cutters 4, 5. In this condition, a short, prismatic block 2 is rotated by an external force while the electrode is pressed onto the short prismatic block 2, so that a circular plane is cut by a center part, flat projecting cutter 3 while a taper face is cut by the first and the second projecting cutters 4, 5. During this process, the width of a top face of the center part, flat projecting cutter 3 is narrow, so that the excellent cutting property is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerator for scraping off the electrode surface of a spot welding rod which has been deformed by wear.

[0002]

2. Description of the Related Art A shaving regenerator consisting of a short columnar block having a plurality of radially projecting blades for forming a rotating surface matching the electrodes of a spot welding rod is known.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to enable quicker shaving and reclaiming work as compared with the conventional shaving and regenerator.

[0004]

A means for solving the problems will be described with reference to the drawings. In the spot welding rod electrode surface scraping regenerator according to the present invention, the edge 3a corresponding to the diameter line of the electrode 1a tip circular plane 1b of the spot welding rod 1 is formed on the upper and lower surfaces of the short columnar block 2 whose upper and lower surfaces are parallel to each other. The central plate-shaped protruding blade 3 having the inclined surface 3c on the non-diameter line side of the top surface 3b is formed, and the entire circumference of the central plate-shaped protruding blade 3 is independently separated, and the electrode tip tapered surface 1c is formed. The projecting blades 4 and 5 that form the rotation surface that conforms to the above are radially formed and are discontinuously formed with the central plate-like protruding blade 3.

In addition to the one described above, the spot welding rod electrode surface scraping regenerator according to the present invention is for passing the re-polishing tool 9 to the short column block 2 along the side wall bases 4b and 5b of the protruding blades 4 and 5. The groove 8 is provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a substantially truncated cone-shaped electrode 1a of an electrode rod is formed of a circular flat surface 1b at the tip and a tapered surface 1c.

As shown in FIGS. 3 to 8, the spot welding rod electrode surface scraping regenerator is a radial projection blade 4 which forms a rotation surface K which coincides with the substantially frustoconical electrode 1a of the spot welding rod 1. An electrode surface shaving regenerator having 5 on both upper and lower end surfaces of a short columnar block 2, wherein a central circular plate-shaped protruding blade for tip circular flat surface shaving 3 having one edge 3a arranged on a diameter line is
An inclined surface 3c is provided on the non-diameter line side of the top surface 3b. In addition, the tapered surface 1 is formed on the diameter line on both sides of the flat plate-shaped protruding blade 3 at the center.
c The taper surface 1c is provided with the first projection blades 4 and 4 for shaving, and a slight gap P is held between the central axis Q and Q in both radial directions orthogonal to the central plate-shaped protruding blade 3. Second use
The protruding blades 5 and 5 are arranged, and the recesses 4a and 4a are provided in the portions of the first protruding blades 4 and 4 which are in contact with the central plate-shaped protruding blade 3. In addition, 6a is a chip discharge hole, and 6b is a groove.

In FIG. 3, the first protruding blade 4 is flat and the second protruding blade 5 is substantially triangular, but the first protruding blade 4 is a substantially triangular protruding blade and the second protruding blade 5 is also shown. May be flat, or both the first and second protruding blades 4 and 5 may be substantially triangular protruding blades as shown in FIG. 4, or the first and second protruding blades 4 and 5, respectively. 5 may be a plate-like protruding blade.

The radius of the tip of the electrode 1a at the reference value is B,
The radius of the spot welding rod is G, the radius of the circle having the center on the central axis Q-Q and contacting the inclined lower end of the second protruding blade 5 is A, the center on the central axis Q-Q, and the central plate shape The radius of the circle that is in contact with the protruding blade 3 is C, the radius of the circle that is centered on the central axis Q-Q and that is in contact with the inclined lower ends of the two first protruding blades 4 and 4 is E, and the center is on the central axis Q-Q. Has and first
Assuming that the radius of a circle passing through the upper ends of the inclined surfaces of the protruding blade 4 and the second protruding blade 5 is F, there is a relationship of A = or <B = or <C <E <G <F. In addition, from the neutral plane MM to the second protrusion blade 5
Where H is the height of the inner end of H and J is the height of the central plate-like protruding blade 3 from the neutral plane M-M, the relationship of H = or <J is established.

When the tip of the electrode 1a is applied to the first and second protruding blades 4 and 5, the electrode 1a is guided and supported by these four protruding blades 4 and 5. In this state, when the short columnar block 2 is rotated by an external force and the electrode 1a is pressed toward the short columnar block 2, the circular flat surface 1b is scraped by the central flat plate-shaped protruding blade 3 and the first and second protruding blades 4, 4. The tapered surface 1c is cut by 5 and the tip of the tapered surface 1c is cut only by the second protruding blade 5. At this time, since the top surface of the central plate-shaped protruding blade 3 is narrower than that of the conventional product, it has excellent machinability.

9 to 11 show a chip discharge hole 6a having a different shape, and the present invention can also be applied to this shape.

As shown in FIGS. 12 to 14, concave grooves 8 for passing the re-polishing tool 9 are provided along the side surface base portions 4b and 5b of the protruding blades 4 and 5.

[0013]

In the prior art, since a blade having no recess 4a was used for cutting, the cutting of the peripheral edge of the circular plane 1b was hindered by the lower end of the first protruding blade 4, and the cutting ability was remarkably poor.
However, when the recessed portion 4a is provided, the shaving of the peripheral edge of the circular plane 1b is not obstructed by the first protruding blade 4, so that the shaving ability can be significantly improved.

Further, the re-grinding tool 9 such as a grinder or the like can be used to easily re-ground the cutting blade portions 4c and 5c of the protruding blades 4 and 5 by utilizing the groove 8.

Further, the plate-shaped protruding blade 3 having a narrow central portion
The top surface 3b has excellent machinability.

[Brief description of drawings]

FIG. 1 is a side view of a tip of a spot welding rod.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a plan view of the first embodiment.

FIG. 4 is a plan view of the second embodiment.

5 is a sectional view taken along line XX of FIGS. 3 and 4. FIG.

6 is a partially enlarged view of FIG.

FIG. 7 is a Y-Y cut end view of FIGS. 3 and 4;

FIG. 8 is a ZZ cut end view of FIGS. 3 and 4;

FIG. 9 is a plan view of the third embodiment.

10 is a sectional view taken along line RR of FIG.

11 is a sectional view taken along line SS of FIG.

FIG. 12 is a plan view of the fourth embodiment.

13 is a TT cut end view of FIG. 12. FIG.

FIG. 14 is a sectional view taken along the line WW of FIG.

[Explanation of symbols]

 1 Spot Welding Rod 1a Electrode 1b Circular Plane 1c Tapered Surface 2 Short Column Block 3 Center Plate Flat Projecting Blade 3a One Edge 3b Top Surface 3c Sloping Surface 4 First Protrusion Blade 4a Recess 4b Base 4c Cutting Blade 5 Second Protrusion Blade 5b Base 5c Cutting edge 6a Chip discharge hole 6b Groove 8 Groove 9 Regrinding tool K Rotating surface Q Center axis P Gap

Claims (2)

[Claims] 1. An electrode (1) of a spot welding rod (1) is provided on both upper and lower surfaces of a short columnar block (2) whose upper and lower surfaces are parallel to each other.
a) One edge (3) corresponding to the diameter line of the tip circular plane (1b)
a) and has a sloped surface (3) on the non-diameter line side of the top surface (3b).
c) The central flat plate-shaped protruding blade (3) is formed, and the entire circumference of the central flat plate-shaped protruding blade (3) is independently separated to form a rotation surface that matches the electrode tip tapered surface (1c). A spot welding rod electrode surface scraping regenerator in which the protruding blades (4, 5) are formed radially and are discontinuous with the central plate-shaped protruding blade (3). 2. An electrode (1) of a spot welding rod (1) is formed on both upper and lower surfaces of a short columnar block (2) whose upper and lower surfaces are parallel to each other.
a) One edge (3) corresponding to the diameter line of the tip circular plane (1b)
a) and has a sloped surface (3) on the non-diameter line side of the top surface (3b).
c) The central flat plate-shaped protruding blade (3) is formed, and the entire circumference of the central flat plate-shaped protruding blade (3) is independently separated to form a rotation surface that matches the electrode tip tapered surface (1c). The protruding blades (4, 5) are formed radially and are formed discontinuously with the central plate-like protruding blade (3), and the side wall bases (4b, 5) of the protruding blades (4, 5) are formed.
The spot-welding electrode surface scraping regenerator according to claim 1, wherein the short columnar block (2) is provided with a concave groove (8) for passage of the re-polishing tool (9) along b).